LTC1709是2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator

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LTC1709 - LTC1709是2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator

LTC1709是Linear公司的一款数字可编程的降压型稳压器产品，LTC1709是2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator，本站介绍了LTC1709的封装应用图解、特点和优点、功能等，并给出了与LTC1709相关的凌力尔特元器件型号供参考。

LTC1709 - 2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator

LTC1709 - 2-Phase, 5-Bit Adjustable,High Efficiency, Synchronous Step-Down Switching Regulator - Linear Technology（凌力尔特）

功能描述

The LTC1709 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at a optimum frequency for efficiency. Thermal design is also simplified. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications. The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipaton during short-circuit conditions when overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values.

特点

Two Ouput Stages Operate Antiphase ReducingInput Capacitance and Power Supply Noise

5-Bit VID Control (VRM 8.4 Compliant)VOUT: 1.3V to 3.5V in 50mV/100mV Steps

Current Mode Control Ensures Current Sharing

True Remote Sensing Differential Amplifier

OPTI-LOOP™ Compensation Minimizes COUT

Programmable Fixed Frequency: 150kHz to300kHz—Effective 300kHz to 600kHz SwitchingFrequency

±1% Output Voltage Accuracy

Wide VIN Range: 4V to 36V Operation

Adjustable Soft-Start Current Ramping

Internal Current Foldback

Short-Circuit Shutdown Timer with Defeat Option